[FFmpeg-user] nvenc h264 encoding

[tyt xtreme]

I have post renamed the file but i've did the re-encoding again on the
original file like this:

log:
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high -preset:v fast
perspective_out.mp4
ffmpeg version N-81960-g1bda0ee Copyright (c) 2000-2016 the FFmpeg
developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth
--enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme
--enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264
--enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinger --enable-libsnappy --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg
--enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 32.100 / 55. 32.100
  libavcodec     57. 61.100 / 57. 61.100
  libavformat    57. 51.103 / 57. 51.103
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 63.100 /  6. 63.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  2.100 /  2.  2.100
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'perspective.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.50.100
  Duration: 00:07:27.87, start: 2.132000, bitrate: 10235 kb/s
    Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 /
0x31637661), yuv420p(tv, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 10233 kb/s,
24.94 fps, 29.97 tbr, 1000k tbn, 2000k tbc (default)
    Metadata:
      handler_name    : VideoHandler
File 'perspective_out.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'perspective_out.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.51.103
    Stream #0:0(eng): Video: h264 (h264_nvenc) (High) ([33][0][0][0] /
0x0021), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], q=-1--1, 2000 kb/s, 29.97
fps, 30k tbn, 29.97 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc57.61.100 h264_nvenc
    Side data:
      cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 4000000 vbv_delay:
-1
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_nvenc))
Press [q] to stop, [?] for help
Past duration 0.731316 too large    8815kB time=00:00:27.22
bitrate=2652.4kbits/s dup=206 drop=0 speed=3.95x
....

On Fri, Oct 14, 2016 at 1:14 PM, Sven C. Dack <sven.c.dack at sky.com> wrote:

> On 14/10/16 11:53, tyt xtreme wrote:
>
>> Thanks for the help and explanation! I can tell the encoding runs now,
>> tried with the following command:
>> $ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high -preset:v fast
>> perspective_out.mp4
>>
>> but the output image/video coloring really weird. from a normal coloring
>> it's going to be weird mixture of green,red "ghosty" image.
>> The input file details are:
>> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'perspective.mp4':
>>    Metadata:
>>      major_brand     : isom
>>      minor_version   : 512
>>      compatible_brands: isomiso2avc1mp41
>>      encoder         : Lavf57.50.100
>>    Duration: 00:07:27.87, start: 2.132000, bitrate: 10235 kb/s
>>      Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 /
>> 0x31637661), yuv420p(tv, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 10233 kb/s,
>> 24.94 fps, 29.97 tbr, 1000k tbn, 2000k tbc (default)
>>      Metadata:
>>        handler_name    : VideoHandler
>>
>> The output file details are:
>> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
>>    Metadata:
>>      major_brand     : isom
>>      minor_version   : 512
>>      compatible_brands: isomiso2avc1mp41
>>      encoder         : Lavf57.51.103
>>    Duration: 00:07:27.92, start: 0.000000, bitrate: 5301 kb/s
>>      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p,
>> 3840x2160 [SAR 1:1 DAR 16:9], 5300 kb/s, 29.97 fps, 29.97 tbr, 30k tbn,
>> 59.94 tbc (default)
>>      Metadata:
>>        handler_name    : VideoHandler
>>
>> Any idea?
>>
>> Something is not right here. In your example command line do you call the
> output file "prespective_out.mp4" but in the details below is it called
> "output.mp4". The original file also shows to have a frame rate of 24.94
> fps, but "output.mp4" is reported to have 29.97 fps, and you didn't perform
> and frame rate conversion on the command line.
>
> Can you double check this, please?
>
>
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